Electrical Circuits

• Ohms Law= Voltage= Current x Resistance
• Current is the rate of flow of charge in a circuit, measured in Amps (A)
• Voltage/Potential difference is the force that pushes current (Amps) around a circuit, it's measured in Volts (V)
• Resistance is the force that opposes the flow of current around a circuit, it's measured in Ohms (Ω)
• An L.D.R (Light dependent resistor)is a device that changes its resistance based on the amount of light its exposed to.

  When exposed to light, resistance decreases.

  When there is no light, resistance increases.
• A fixed resistor is a device that has a set amount of resistance that does not change. They are used to control the flow of electrical current.
• A milliammeter measures current

  a voltmeter measures voltage